kyle called himself, "the most lethal sniper in u.s. history," and was an outspoken advocate for war veterans. "my only regrets are the guys i couldn't save. that's what keeps me up at night. but every shot i took, i felt extremely justified." police arrested 25-year-old eddie ray routh... a former marine who is believed to have left the service in 2010, according to a u-s military official. the erath county sheriff says the three men apparently went to the gun range together. after the shooting authorities say routh retreated to his sister's house and told her about the incident. she then called police and after a short pusuit, routh was arrested. he is now facing capital murder and two other charges. chris kyle and chad littlefield were both invovled in helping veterans with p-t-s-d... however, it is uncertain whether routh was a veteran they were counseling. "i don't know that we'll ever know. i mean, he's the only one that knows that. but at this point, he hasn't made any comments to law enforcement as to why he did it." travis cox